7/24/2023 0 Comments Big dipper constellation![]() It is a rapid rotator and, as a result, its shape has been distorted into an oblate spheroid. It has a companion, a white main sequence star, in close orbit.Īchernar is the ninth brightest star in the sky, with an apparent magnitude that varies from 0.40 to 0.46, and one of the flattest stars known. It is the hottest, bluest of the 10 brightest stars in the sky. The brightest star in the constellation is Achernar, Alpha Eridani, a B-class white main sequence star with a luminosity more than 3,000 times that of the Sun. It is mostly invisible to observers north of latitude 32°N. 11.5) and the most prominent member of the NGC 691 Group, which also includes the pair NGC 680 and NGC 678, and the spiral galaxy NGC 694.Įridanus, the celestial river, is the sixth largest constellation in the sky, with an area of 1138 square degrees. These include NGC 772, an unbarred spiral galaxy with an apparent magnitude of 11.1, surrounded by several satellite galaxies, the interacting pair NGC 935 and IC 1801, the intermediate spiral galaxy NGC 877, the brightest member of the NGC 877 Group, NGC 691, another unbarred spiral galaxy (mag. The brighter component in the system is a white main sequence star.Īries is home to several notable galaxies. Sheratan, Beta Arietis, is a spectroscopic binary star system with a visual magnitude of 2.65. It is an orange giant with an apparent magnitude of 2.00, which makes it about as bright as Polaris, the North Star. Hamal, Alpha Arietis, is the brightest star in Aries and the 49th brightest star in the sky. Other galaxies in Triangulum include the spiral galaxies NGC 634, NGC 784 and NGC 925, and the interacting pair NGC 672 and IC 1727.Īries, the Ram, occupies an area of 441 square degrees and, with only two stars brighter than magnitude 3.00, it is not a particularly bright constellation. Triangulum Galaxy, image: Alexander Meleg The Triangulum Galaxy hosts NGC 604, one of the largest H II regions known, and several other emission nebulae, including NGC 588, NGC 592 and NGC 595. The galaxy is located between Mirach and the bright stars Hamal and Sheratan in Aries constellation. The easiest way to find it is using Mirach, the middle star in the chain of three bright stars of Andromeda that stretches from the Great Square of Pegasus to Perseus. The Triangulum Galaxy lies outside the triangle asterism, near the border with Pisces. It is considerably fainter and more diffuse than its larger neighbour, the Andromeda Galaxy, and requires exceptionally good conditions to be seen. M33 is a spiral galaxy with an apparent magnitude of 5.72. The best known of these is the Triangulum Galaxy (Messier 33), the third largest galaxy in the Local Group and one of the most distant objects visible to the unaided eye. ![]() Triangulum contains several notable deep sky objects. Beta and Gamma Trianguli mark the base of the triangle and Alpha Trianguli, the apex. The brightest stars in Triangulum are Deltotum (Beta Trianguli), a class A subgiant star with a spectroscopic companion and an apparent magnitude of 3.00, Mothallah (Alpha Trianguli), a magnitude 3.42 F-class subgiant or giant, also in a spectroscopic binary system, and Gamma Trianguli, a white main sequence star with a magnitude of 4.03. To capture more stars you can increase the ISO, but remember that if you’re photographing from a light-polluted area, increasing the imaging chip’s sensitivity will also increase the amount of orange streetlight glow that’s picked up in the photo.Location of the Triangulum Galaxy, image: Wikisky.If the stars are blurry, try making the aperture smaller by one full f/number and increasing the exposure time.Review your image on the camera’s live view screen, using the zoom function to see whether the stars in the image are sharp.If you need to use the bulb setting, use a watch to keep track of exposure time so you know when to release the shutter.Press the shutter release to take the picture.Choose an ISO setting of 400 and a shutter speed between 10 and 30 seconds.Set the aperture to its widest setting (the smallest f/number).Mount your camera on a tripod and attach the remote shutter release. ![]() So what's the best way to take a picture of the Plough? Follow our simple steps below and capture this beautiful asterism in the Ursa Major constellation.
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